Very weird visual/gamecrashing bug tha that happenes only to me.

  A  friend's realm that has plenty of  furniture/tropical addons. It recently got some new addons but when i joined  , the crazy  bugs happened. The  video is a  compressed  version of what happens. Basiaclt every texture glitches, includeing menus, the  chat bar,the hot bar ect. If you look  somewhere, you might find a very laggy place where these buggs happen, to the point of crashing the game immeditaly. Why does this happen and is it fixable? My phone is an s9+.